这是简单的比赛签到题,类似于A+B Problem 。
Class
Problem Description
Avin has two integers $a, b (1 \leq a, b \leq 1, 000)$.
Given $x = a + b$ and $y = a - b$, can you calculate $a * b$?
Input
The first line contains two integers $x, y$.
Output
Print the result of $a * b$.
Sample Input
4 2
Sample Output
3
program
1 | /* |